Release v0.6.7

https://github.com/tendermint/tm-db/blob/v0.6.7/CHANGELOG.md

Release v0.6.6

This release is the same API as v0.6.4, but bypasses the accidental v0.6.5
release that exported a different API. Any existing users of v0.6.5 may continue
to use that tag.

https://github.com/tendermint/tm-db/blob/v0.6.6/CHANGELOG.md

v0.6.4

https://github.com/tendermint/tm-db/blob/v0.6.4/CHANGELOG.md#064

v0.6.3

https://github.com/tendermint/tm-db/blob/3c338cacbc15dd43b0cf16278d860b4e64c543bc/CHANGELOG.md#063

v0.5.2

https://github.com/tendermint/tm-db/blob/0.5.x/CHANGELOG.md#052

v0.6.1

https://github.com/tendermint/tm-db/blob/919e86df3ac8564c23030a5194bf79931904aa9e/CHANGELOG.md#061

v0.6.0

https://github.com/tendermint/tm-db/blob/master/CHANGELOG.md#060

v0.5.1

#82

v0.5.0

https://github.com/tendermint/tm-db/blob/master/CHANGELOG.md#050

v0.4.1

https://github.com/tendermint/tm-db/blob/master/CHANGELOG.md#041